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CVE-2026-61477

Libvirt: libvirt: newline injection in network xml dns txt/srv fields allows dnsmasq config directive injection

Published: Aug 7, 2026Updated: Aug 7, 2026 Sources: CVE List NVDCWE-93
2.3LOW
NVD MITRE
EPSS Score
0.2%
Top 84.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
Not available

Description

An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq configuration file generated by the network driver, allowing a user with permission to define virtual networks to inject arbitrary dnsmasq configuration directives such as dhcp-script, leading to arbitrary command execution as root.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:UC:NI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-93

Affected Products

Red Hat
commercial·US
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux for NVIDIA 26On-premOS
Operating Systems / linux-distro
and 4 more affected products View all →

Exploitability

Workaround Available

References

https://access.redhat.com/security/cve/CVE-2026-61477
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2512066
bugzilla.redhat.com
https://gitlab.com/libvirt/libvirt/-/commit/3cfc77963b512d809348fca07f97fe924fac9a05
gitlab.com

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